Red Bull dominance may end - Newey

Adrian Newey admits he is unsure whether Red Bull can continue its dominance of Formula One beyond 2013.

After Sebastian Vettel and Red Bull secured a fourth consecutive championship double at the Indian Grand Prix, attentions are now turning to the rule changes which will have such a major impact on the 2014 season. While it was put to Newey that he could interpret the new regulations better than any other team and continue Red Bull's form, Newey said there were too many unknowns including ones which were outside of his hands.

"We might but you don't know; that's the thing about rule changes isn't it?" Newey said. "We've had occasions where we have managed to do that, but we've got big aerodynamic changes - not as big as 2009 but still very significant - and then we've got obviously the engine package which from our side is a very complicated package to install.

"From Renault's side what is not at all clear at the moment is whether one of the three manufacturers will have a significant benefit over the others. And I think reliability is going to be a big issue at the start of the season as well."

Asked whether the bigger influence on next year's cars would be new regulations or designs which have been restricted from recent years, Newey replied: "Ultimately the restrictions.

"You have these changes which are exciting and different when you have a big regulation change such as we have for next year. But when you sit down and go through the details it's actually more and more restrictions; the beam wing is banned next year, the nose is more restricted. The front wing being narrower is not a restriction - it's just a change - but the nose and the beam wing are without doubt restrictions, and the exhausts of course, most importantly."